CN106573506B - Pneumatic tire - Google Patents
Pneumatic tire Download PDFInfo
- Publication number
- CN106573506B CN106573506B CN201580043988.2A CN201580043988A CN106573506B CN 106573506 B CN106573506 B CN 106573506B CN 201580043988 A CN201580043988 A CN 201580043988A CN 106573506 B CN106573506 B CN 106573506B
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- Prior art keywords
- tire
- contour line
- width direction
- vehicle installation
- contour
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- 238000009434 installation Methods 0.000 claims abstract description 45
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 5
- 230000000694 effects Effects 0.000 description 17
- 210000003754 fetus Anatomy 0.000 description 13
- 238000011156 evaluation Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000011324 bead Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000004073 vulcanization Methods 0.000 description 3
- 208000008899 Habitual abortion Diseases 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000001953 sensory effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/0083—Tyre tread bands; Tread patterns; Anti-skid inserts characterised by the curvature of the tyre tread
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/0302—Tread patterns directional pattern, i.e. with main rolling direction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/0304—Asymmetric patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/0306—Patterns comprising block rows or discontinuous ribs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/0327—Tread patterns characterised by special properties of the tread pattern
- B60C11/033—Tread patterns characterised by special properties of the tread pattern by the void or net-to-gross ratios of the patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0339—Grooves
- B60C2011/0341—Circumferential grooves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0339—Grooves
- B60C2011/0341—Circumferential grooves
- B60C2011/0353—Circumferential grooves characterised by width
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0339—Grooves
- B60C2011/0358—Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0339—Grooves
- B60C2011/0381—Blind or isolated grooves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0339—Grooves
- B60C2011/0381—Blind or isolated grooves
- B60C2011/0383—Blind or isolated grooves at the centre of the tread
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0386—Continuous ribs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0386—Continuous ribs
- B60C2011/0388—Continuous ribs provided at the equatorial plane
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C3/00—Tyres characterised by the transverse section
- B60C3/04—Tyres characterised by the transverse section characterised by the relative dimensions of the section, e.g. low profile
Abstract
A kind of pneumatic tire for balancedly improving control stability, resistance to hydroplaning performance and resistance to partial wear performance is provided.The contour line (PL1) of center land (X) is prominent to tire radial outside compared with reference contour (PL0).The tire width direction two-end-point (A5, A6, A7, A8) of tire width direction outermost point (A2, A4) and tire shoulder major trough (14c, 14d) comprising central major trough (14a, 14b) and than 2 central major troughs (14a, 14b) by divide successively on the outside of tire width direction formation secondary center land (Y1, Y2) and shoulder land department (Z1, Z2) contour line (PL2, PL3) it is prominent to tire radial outside compared with reference contour (PL0).The groove area ratio Go of vehicle installation exterior lateral area and the groove area ratio Gi of vehicle installation inside region meet Gi>Go relation.
Description
Technical field
The present invention relates to one kind balancedly improve control stability, resistance to hydroplaning (skid-resistant water effect) performance and
The pneumatic tire of resistance to partial wear performance.
Background technology
It is known in order to improve control stability, it is to be ensured that tread rigidity, the land portion width of fetus face is set to greatly.So
And if land portion width to be set to too much, the earth contact pressure meeting step-down of the tire width direction center position in land portion.Cause
This, the tire circumference both ends of the near center location shorten towards land portion internal modification, ground contact length, may result in ground connection
Property so control stability be deteriorated.
Improve the correlation technique of control stability as with ground connection property is improved, it is known to which it is towards tire to make land portion
The curve shape of radial outside protrusion, so as to improve the technology (Japanese Unexamined Patent Publication of the straight trip stability of one of control stability
2002-029216 publications).
The content of the invention
Problems to be solved by the invention
As disclosed in Japanese Unexamined Patent Publication 2002-029216 publications, it is the curve towards tire radial outside protrusion to make land portion
Shape, so as to improve ground connection property.In addition, the determination method of the curve shape disclosed in Japanese Unexamined Patent Publication 2002-029216 publications,
It is to use a kind of method of tread contour line in the whole tire width direction of tread surface.
In recent years, it is desirable to which exploitation will not only possess excellent control stability, also possess excellent resistance to hydroplaning
The pneumatic tire of performance and/or resistance to partial wear performance.
In view of the above problems, it is an object of the invention to provide one kind balancedly to improve control stability, moisture-proof road
The pneumatic tire of habitual abortion performance and resistance to partial wear performance.
Technical teaching for solving the problem was
Pneumatic tire involved in the present invention is respectively equipped with 1 in each side for clipping the tire width direction of equatorial plane
Circumferentially extended along the central major trough of tire circumferentially extending and 1 on the outside of the tire width direction of above-mentioned central major trough along tire
Tire shoulder major trough, by 4 above-mentioned major troughs divisions formed with the 5 lands portion circumferentially extended along tire.
In above-mentioned pneumatic tire, in tire meridional section view, the tyre width of 2 above-mentioned central major troughs will be included
At least 2 points of curve in 4 points of direction two-end-point is set to reference contour.Divided by 2 above-mentioned central major troughs in being formed
Entreat the contour line in land portion more prominent to tire radial outside than said reference contour line.It is wide in central major trough roller tire more above-mentioned than 2
The contour line of the secondary center land and shoulder land department of formation is divided on the outside of degree direction successively than said reference contour line to tire
Radial outside protrudes, and the contour line of the secondary center land and shoulder land department is present in the tyre width side for clipping equatorial plane
To each side and tire width direction outermost point and the tire width direction of above-mentioned tire shoulder major trough comprising above-mentioned central major trough
Two-end-point.The groove area ratio Go of vehicle installation exterior lateral area and the groove area ratio Gi of vehicle installation inside region meet Gi>
Go relation.
The effect of invention
In pneumatic tire involved in the present invention, the contour line and fetus face in the land portion to dividing formation on fetus face
Groove area ratio improved.Its result is that, according to pneumatic tire involved in the present invention, can balancedly improve manipulation
Stability, resistance to hydroplaning performance and resistance to partial wear performance.
Brief description of the drawings
Fig. 1 is the plan for the tread surface for representing the pneumatic tire involved by embodiments of the present invention.
Fig. 2 is the tire meridional section figure for the fetus face for representing the pneumatic tire shown in Fig. 1.
Fig. 3 is the plan for the ground plane shape for representing pneumatic tire, and (a) represents conventional pneumatic tire, and (b) represents this
The pneumatic tire of embodiment.
Fig. 4 is that Fig. 2 circle surrounds part B enlarged drawing.
Embodiment
Hereinafter, with reference to the accompanying drawings, to the embodiment of pneumatic tire involved in the present invention (basic mode as shown below with
And additional mode 1 to 3) be described in detail.Additionally, this invention is not limited to these embodiments.In addition, above-mentioned embodiment
Can easily it be replaced or practically identical key element comprising those skilled in the art in inscape.And then art technology
Personnel can arbitrarily combine the various modes that above-mentioned embodiment is included in its well known scope.
[basic mode]
Hereinafter, the basic mode of pneumatic tire involved in the present invention is illustrated.In the following description, tire footpath
To the direction referred to the rotating shaft direct cross of pneumatic tire, tire radial direction inner side refers in tire axially towards to the one of rotary shaft
Side, tire radial outside refer to the side that rotary shaft is radially left in tire.In addition, tire circumferentially refers to above-mentioned rotary shaft
Centered on axle surround direction.Furthermore tire width direction refers to the direction with above-mentioned rotating axis parallel, tire width direction
Inner side refers to towards the side of equatorial plane (tire equator line), tire width direction outside refer on tire width direction
The side of equatorial plane is left on tire width direction.In addition, equatorial plane refers to the rotary shaft of pneumatic tire just
Intersecting and merging and the plane at the tyre width center for passing through pneumatic tire.
Fig. 1 is the plan for the tread surface for representing the pneumatic tire involved by embodiments of the present invention.In addition, Fig. 1
Label CL represent equatorial plane, label E, E ' represent the ground connection end line of pneumatic tire respectively.In addition, the tyre surface shown in Fig. 1
Pattern is the asymmetrical pattern between equatorial plane CL tire width direction both sides.
The fetus face 10 of pneumatic tire 1 is formed by elastomeric material (tread-rubber), pneumatic tire 1 tire radial direction most
Outside is exposed, and its surface turns into the profile of pneumatic tire 1.The surface of fetus face 10 is formed as turning into installation pneumatic tire 1
The tread surface 12 in face being in contact during vehicle traveling (not shown) with road surface.
As shown in figure 1, in tread surface 12,4 circumferential slots 14a, 14b, 14c, the 14d circumferentially extended along tire are in tire
It is provided at predetermined intervals on width, using equatorial plane CL as boundary, it is outer that circumferential slot 14a, 14c are arranged at vehicle installation
Side, circumferential slot 14b, 14d are arranged at vehicle installation inner side.Hereinafter, circumferential slot 14a, 14b are referred to as central major trough sometimes, will
Circumferential slot 14c, 14d are referred to as tire shoulder major trough.
In addition, in the present embodiment, circumferential slot 14a~14d is not limited to as shown in Figure 1 circumferentially linear along tire
The groove of ground extension, in addition to there is amplitude on tire width direction, circumferentially extended along tire to corrugated or zigzag
Groove.
In addition, in tread surface 12, circumferentially it is provided with tire with constant space from circumferential slot 14a (14b, 14d) direction
The tipper 16a (16b, 16d) that the circumferential equidirectional of the outer lateral tire of vehicle installation extends and terminated in the portion of land.In addition,
With the position that circumferential slot 14a (14b, 14d) and tipper 16a (16b, 16d) connect formed with chamfered section 18a (18b,
18d)。
And then as shown in figure 1, in tread surface 12, circumferentially it is provided with tire with constant space across ground connection end line E
The translot 20a (20b) of (E ') extension.In addition, the translot 20a in vehicle installation outside is arranged at also across tire shoulder major trough 14c, separately
Outside, with the position that tire shoulder major trough 14c and translot 20a connect formed with chamfered section 18c.
According to the above, in the present embodiment, using more bar groove 14a, 14b, 14c, 14d, 16a, 16b, 16c,
20a, 20b are divided formed with 5 lands portion (center land X, secondary center land Y1, Y2 and shoulder land department Z1, Z2).In in addition,
It is respectively so-called annular ribs bar (rib) to entreat land portion X, secondary center land Y1, Y2 and shoulder land department Z2, and shoulder land department Z1 is
By the multiple pieces of block formed groups.
Fig. 2 is the tire meridional section figure for the fetus face for representing the pneumatic tire shown in Fig. 1.In reference numeral in Fig. 2
With in Fig. 1 label identical label represent with Fig. 1 shown in component identical component.
In fig. 2, central major trough 14a, 14b tire width direction two-end-point are set to A1, A2, A3, A4, and will
Tire shoulder major trough 14c, 14d tire width direction two-end-point are set to A5, A6, A7, A8.
Then, by least 2 in 4 points of tire width direction two-end-point A1~A4 comprising 2 central major trough 14a, 14b
The curve of point is set to reference contour PL0.Can be red away from tire for example, as at least 2 points of selection example in above-mentioned 4 points
The combination of 2 near road face CL point A1, A3 and the combination away from 2 remote point A2, A4 of equatorial plane, in addition, such as Fig. 1 institutes
The example that shows like that or this 4 points institute a little.Reference contour PL0 can be circular arc, elliptic arc and other are any
Kind curve.
Under the premise of such, as shown in Fig. 2 dividing to be formed using 2 central major trough 14a, 14b in the present embodiment
Center land X contour line PL1 it is prominent more to tire radial outside compared with reference contour PL0.
Then, in fig. 2, by each side of tire width direction for clipping equatorial plane CL, comprising central major trough 14a
The tire width direction outermost point A2 (A4) and tire shoulder major trough 14c (14d) of (14b) tire width direction two-end-point A5, A6
The curve of (A7, A8) is set to contour line PL2 (PL3).Contour line PL2 (PL3) is than central major trough 14a (14b) roller tire
Secondary center land Y1 (Y2) and shoulder land department Z1 (Z2) the common contour line of formation are divided on the outside of width successively.
Under the premise of such, as shown in Fig. 2 contour line PL2 (PL3) is compared with reference contour PL0 in the present embodiment
It is more prominent to tire radial outside.
In addition, as shown in Fig. 2 the groove area ratio Go of vehicle installation exterior lateral area installs with vehicle in the present embodiment
The groove area ratio Gi of inside region meets Gi>Go relation.Herein, groove area ratio refers to, (vehicle installation is outer for specific region
Side region or vehicle installation inside region) plan view in groove area relative to the area of whole region ratio.In addition,
Vehicle installation exterior lateral area refers in region shown in Fig. 1 from equatorial plane CL to ground connection end line E region, in vehicle installation
Side region refers in region shown in Fig. 1 from equatorial plane CL to ground connection end line E ' region.
(effect etc.)
As shown in Fig. 2 in the present embodiment by making contour line PL1 and contour line PL2, PL3 compared with reference contour PL0
It is more prominent to tire radial outside and meet Gi>Go relation, following action effect is reached.
Fig. 3 is the plan for the ground plane shape for representing pneumatic tire.In addition, Fig. 3 (a) represents conventional pneumatic tire,
Fig. 3 (b) represents the pneumatic tire of the present embodiment shown in Fig. 1 and Fig. 2.In addition, Fig. 3 (a) tread pattern is as follows
Example：It is identical with the tread pattern shown in Fig. 1 (plan view), but contour line PL1, PL2, PL3 shown in Fig. 2 are and reference wheel
Profile PL0 is consistent.
That is, in conventional pneumatic tire, contour line PL1, PL2, PL3 shown in Fig. 2 are and reference contour PL0 mono-
Cause.Therefore, the ground connection of the tire width direction center position in land portion is forced down, and as shown in Fig. 3 (a), causes the center attached
Tire circumference both ends nearby are changed into concaveconvex shape (specifically referring to Fig. 3 towards land portion internal modification, the outer peripheral lines of ground plane
(a) dotted portion).Influenceed by the concaveconvex shape of the outer peripheral lines, the tire width direction near center location in each land portion
The part that ground contact length shortens can be produced, ground connection property or even control stability may be caused to be deteriorated.
On the other hand, in the pneumatic tire of present embodiment, contour line PL1, PL2, PL3 shown in Fig. 2 both with respect to
Reference contour PL0 is radially projecting to tire.Therefore, it is possible to make the ground connection at the tire width direction near center location in land portion
Earth contact pressure at pressure and its outer fix of tire width direction two is of substantially equal.Thus, it is possible to suppress at the near center location
Tire circumference both ends are towards land portion internal modification.Its result is：As shown in Fig. 3 (b) dotted line, on ground plane, each land portion
X, Y1, Y2, Z1, Z2 tire circumferential end border (step into side and walk out of side equal) are on 1 smooth curve.Accordingly, it is capable to
The ground contact length of each land portion X, Y1, Y2, Z1, Z2 on tire width direction is enough set to enter than the example homogenization shown in Fig. 3 (a)
And ground connection property (effect 1) can be improved.
In addition, as shown in Fig. 2 in the present embodiment, particularly across and secondary center land Y1 (Y2) and shoulder land department Z1
(Z2) set 1 contour line PL2 (L3), i.e., make the outline of secondary center land Y1 (Y2) and shoulder land department Z1 (Z2) foreign steamer
Exterior feature is meaningful on same curves.
That is, by across and secondary center land Y1 (Y2) and shoulder land department Z1 (Z2) set 1 contour line PL2 (PL3), not only
The ground connection property of tire width direction can be improved to secondary center land Y1 (Y2) and shoulder land department Z1 (Z2) respectively, by pair
In the case that centre land portion Y1 (Y2) and shoulder land department Z1 (Z2) is considered as one, additionally it is possible to make the tire of the ground connection property between these land portions
Width variable quantity smoothly changes, and then, it can fully improve shoulder zone especially on the outside of tire width direction
Ground connection property (effect 2).
And then in the present embodiment, make the groove area ratio Go and vehicle installation medial area of vehicle installation exterior lateral area
The groove area ratio Gi in domain meets Gi>Go relation, thus, it is possible on the inside of the big vehicle installation of the degree for influenceing drainage performance
More groove is arranged, substantially ensures that drainage path (effect 3).In addition, by meeting Gi>Go relation, it can influence to manipulate
The vehicle installation outside that the degree of stability etc. is big makes groove less, improves the rigidity in land portion.(effect 4)
So, in the pneumatic tire of present embodiment, the ground connection property (effect of the tire width direction in each land portion is improved
1) the ground connection property (effect 2) between secondary center land and shoulder land department, is improved, and by making the groove in vehicle installation outside less
To improve the rigidity in land portion (effect 4).
Therefore,, can not only under the complementing each other of above-mentioned effect 1,2,4 according to the pneumatic tire of present embodiment
Realize excellent control stability (straight trip performance and in turn performance is included in, such as also including easy changing Lane
Performance etc.), additionally it is possible to realize excellent resistance to partial wear performance.
In addition, in the pneumatic tire of present embodiment, by making the groove of vehicle installation inner side more, can substantially ensure that
Drainage path (above-mentioned effect 3), it is achieved in excellent resistance to hydroplaning performance.
Based on above content, according to the pneumatic tire of present embodiment, under the complementing each other of above-mentioned effect 1~4, energy
It is enough balancedly to improve control stability, resistance to hydroplaning performance, resistance to partial wear performance.
In addition, although not shown, but the pneumatic tire involved by illustrated above, present embodiment has and conventional inflation
The same meridional section shape of tire.Herein, the meridional section shape of pneumatic tire refers to, is put down in vertical with equatorial plane
The cross sectional shape of the pneumatic tire occurred on face.The pneumatic tire of present embodiment is in tire meridional section view, from tire
Radially inner side has bead part, sidewall, shoulder portion and fetus face towards outside.Also, above-mentioned pneumatic tire is for example being taken turns
Have in tire meridional section view：Body piles, it extends to the bead part of both sides and around a pair of bead core and rollback from fetus face；
And the belt that sequentially forms of tire radial outside and belt reinforcing layer in above-mentioned body piles.
And then the pneumatic tire of present embodiment can pass through conventional various manufacturing processes, i.e. tire material mixes work
Inspection operation after sequence, tire material manufacturing procedure, green tire molding procedure, vulcanization process and vulcanization etc. obtains.In manufacture originally
In the case of the pneumatic tire of embodiment, especially will in the inwall of vulcanization mould, such as formed with shown in Fig. 1 and Fig. 2
The groove that is formed of fetus face and land portion corresponding to convex portion and recess, vulcanized using the mould.
In addition, in the pneumatic tire of present embodiment, especially it is determined that contour line PL1, PL2, PL3 shown in Fig. 2
When, according to following step.
I.e., first, reference contour PL0 shape is determined.For example, in the case where reference contour PL0 is circular arc, really
Its fixed radius of curvature.On the radius of curvature, it is important to set it to various values according to tire size, in the present embodiment
It is the size of more than 5 times of its section height and less than 20 times.
Then, it is determined that in 4 points of tire width direction two-end-point A1, A2, A3, A4 comprising 2 central major trough 14a, 14b
At least 2 points (for example, point A1 and point A3) and there is the circular arc of the radius of curvature R 0 of center on equatorial plane CL
PL0。
It is next determined that point A1, A3 on the inside of the tire width direction comprising 2 central major trough 14a, 14b and having
The circular arc PL1 of the small radius of curvature R 1 (0.3≤R1/R0≤0.4) of radius of curvature R 0 than circular arc PL0.
Finally, it is determined that point A2 (A4) on the outside of the tire width direction comprising 2 central major trough 14a (14b) and having
The circular arc PL2 (PL3) of the small radius of curvature R 2 (R3) (0.75≤R2 (R3)/R0≤0.95) of radius of curvature R 0 than circular arc PL0.
From point A2 (A4) to tire width direction, outside extends into and across ground connection end line E (E ') to circular arc PL2 (PL3), in point P (P ') and circle
Arc PL0 intersects.
In addition, tires of the circular arc PL1 and circular arc PL2 (PL3) in the circumferential slot 14a (14b) close to equatorial plane CL is wide
Intersect in degree direction region.In addition, point P (P ') compares earth terminal with more than the 3% of tyre contact width and less than 5% size respectively
Line E (E ') is by the outside of tire width direction.
In the case where reference contour PL0 is circular arc, by making the radius of curvature of the circular arc be the 5 of its section height
More than times, it is the shape radially excessively protruded to tire that can prevent reference contour PL0 itself.Thereby, it is possible to will not make compared with
Contour line PL1, PL2, PL3 more prominent to tire radial outside reference contour PL0 radius of curvature is too small, fully realizes each
The ground connection property in land portion improves.In addition, by making above-mentioned radius of curvature to make reference wheel for less than 20 times of its section height
Profile PL0 itself is the shape radially fully protruded to tire.Thereby, it is possible to make compared with reference contour PL0 more to tire radial direction
Contour line PL1, PL2, PL3 protruding outside radius of curvature is fully small, fully realizes the ground connection property in each land portion and improves.
After reference contour PL0 shape (being radius of curvature in the case of circular arc) is determined in this wise, in baseline profile
At least 2 points in central major trough 14a, 14b tire width direction two-end-point A1~A4 are determined on line PL0.Then, it is determined that Fig. 2
Shown center land X contour line PL1, and determine across and secondary center land Y1 (Y2) and shoulder land department Z1 (Z2) extension
Contour line PL2 (PL3).
[additional mode]
Next, explanation can arbitrarily select that implements to add the above-mentioned basic mode of pneumatic tire involved in the present invention
Mode 1~3.
(additional mode 1)
In basic mode, the contour line PL1 of the center land X shown in Fig. 2 is relative to reference contour PL0 to tire footpath
Maximum overhang laterally is preferably more than 0.2mm and below 0.5mm (additional mode 1).
Fig. 4 is that Fig. 2 circle surrounds part B enlarged drawing.As shown in figure 4, in the present embodiment, center land X's
Contour line PL1 relative to reference contour PL0 to the maximum overhang S1 of tire radial outside be set to from reference contour PL0 to
Contour line PL1 tire radial direction full-size.
It is more than 0.2mm by making above-mentioned maximum overhang S1, center land X tire width direction centre bit can be made
The earth contact pressure of vicinity is put further to the earth contact pressure at its outer fix of tire width direction two.Thereby, it is possible to improve with
It the earth-grasping force on road surface, can especially improve steering during vehicle straight trip, and then further improve straight trip performance (operation stabilization
Performance).
In addition, be below 0.5mm by making above-mentioned maximum overhang S1, can suppress center land X in tyre width
The overhang in tire radial direction of direction near center location.Thereby, it is possible to will not make the abrasion at the near center location
Amount is excessive relative to the wear extent at other positions, and then further improves resistance to partial wear performance.
In addition, it is more than 0.3mm and below 0.4mm by making above-mentioned maximum overhang S1, higher level can be distinguished
Reach the effect above.
(additional mode 2)
As shown in Fig. 2 added in basic mode and in basic mode in the mode of additional mode 1, preferably：Secondary center
Land portion Y1 (Y2) and shoulder land department Z1 (Z2) contour line PL2 (PL3) is relative to reference contour PL0 to tire radial outside
Maximum overhang S2 (S3) be more than 0.6mm and below 2.0mm, also, on maximum overhang S2 (S3), in vehicle installation
The contour line PL2 of side maximum overhang (additional mode different from the contour line PL3 in vehicle installation outside maximum overhang
2)。
It is more than 0.6mm by making above-mentioned maximum overhang S2 (S3), secondary center land Y1 (Y2) and tire shoulder can be made
Earth contact pressure at land portion Z1 (Z2) tire width direction near center location is further to its outside of tire width direction two
The earth contact pressure of opening position.Thereby, it is possible to improve the earth-grasping force with road surface, it can especially improve steering during vehicle straight trip,
And then further improve straight trip performance (control stability).
In addition, be below 2.0mm by making above-mentioned maximum overhang S2 (S3), can suppress secondary center land Y1 (Y2) with
And the overhang in tire radial direction of shoulder land department Z1 (Z2) tire width direction center position.Thereby, it is possible to will not make
The wear extent of the near center location is excessive relative to the wear extent of other positions, and then further improves resistance to partial wear performance.
In addition, by making above-mentioned maximum overhang S2 (S3) be more than 0.9mm and below 1.7mm, more Gao Shui can be distinguished
Level land reaches the effect above.
And then in the present embodiment, on maximum overhang S2 (S3), make the contour line PL2's of vehicle installation inner side
Maximum overhang is different from the contour line PL3 in vehicle installation outside maximum overhang.I.e., in the present embodiment, for example, carving
Make to meaning vehicle during turning more than wear extent that the land portion (secondary center land Y1 (Y2) and shoulder land department Z1 (Z2)) in outside is installed
Projecting degree smaller suppress wear extent.In this case, can will not during reaching the life-span from tire new product
Make vehicle installation outside excessively different from the wear extent in the land portion of inner side, and then further improve resistance to partial wear performance.
(additional mode 3)
Added in basic mode and in basic mode at least one mode in additional mode 1,2, preferably：Car
Installation inner side groove area ratio Gi meet 30%≤Gi≤40%, also, vehicle installation outside groove area ratio Go expire
Foot 20%≤Go≤40% (additional mode 3).
It is more than 30% by making the groove area ratio Gi of vehicle installation inner side, drainage performance can be made being particularly susceptible
Vehicle installation inside region into influence arranges more groove, fully ensures drainage path, and then further improve moisture-proof road
Habitual abortion performance.In addition, by make vehicle installation inner side groove area ratio Gi be less than 40%, can will not vehicle installation in
Side region excessively arranges groove, further ensures that the rigidity in land portion, and then further improves control stability.
On the other hand, it is more than 20% by the groove area ratio Go for making vehicle installation outside, can be on the outside of two installations
Region fully arranges groove, fully ensures drainage path, and then further improves resistance to hydroplaning performance.In addition, pass through
The groove area ratio Go for making vehicle installation outside is less than 40%, enables to only spend arranging in vehicle installation exterior lateral area
Groove, further ensures that the rigidity in land portion, and then further improves control stability.
In addition, make the groove area ratio Gi on the inside of vehicle installation illustrated above and the groove area ratio on the outside of vehicle installation
In the case that rate Go is respectively 33%≤Gi≤37%, 25%≤Go≤35%, above-mentioned each effect can be played to higher level
Fruit.
Embodiment
Tire size is set to 235/40ZR18 (95Y), making has and the approximate tyre surface figure of tread pattern shown in Fig. 1
Case and the pneumatic tire with contour line PL1, PL2, PL3 of the tread surface shown in Fig. 2 (Fig. 4) embodiment 1~7.This
Outside, on the terms and conditions at the contour line details of each tread surface of pneumatic tire of embodiment 1~7, such as the following institute of table 1
Show.
On the other hand, tire size is set to 235/40ZR18 (95Y), the pneumatic tire of past case is made, except shown in Fig. 2
Tread surface contour line PL1, PL2, PL3 and reference contour PL0 ' it is consistent beyond, the pneumatic tire of past case have with
The pneumatic tire identical construction of embodiment 1.
Each experiment tire of the 1~embodiment of embodiment 7 made in this wise and past case is assembled in 18 × 8.5J's
Wheel rim, it is 230kPa to make air pressure, is installed on capacity 2000cc car-shaped vehicle, to control stability 1 (straight trip performance),
Control stability 2 (turn performance), resistance to hydroplaning performance and resistance to partial wear performance are evaluated.
(control stability 1 (straight trip performance))
Sensory evaluation is carried out for the intact stability when being kept straight on dry pavement.Then, entered based on the evaluation result
The index assessment of capable on the basis of past case (100).The index of the evaluation is bigger, then it represents that (the straight trip property of control stability 1
Can) better.
(control stability 2 (turn performance))
Sensory evaluation is carried out for the intact stability when being turned on dry pavement.Then, entered based on the evaluation result
The index assessment of capable on the basis of past case (100).The index of the evaluation is bigger, then it represents that control stability 2 is (curving
Can) better.
(resistance to hydroplaning performance)
The running test of the depth of water 10mm puddles of water is driven into implementation on straight road, gradually increases driving into the above-mentioned puddles of water
Speed, measurement produce the critical speed of hydroplaning phenomenon.Then, carried out based on the measurement result on the basis of past case
(100) index assessment.The numerical value of the evaluation is bigger, then it represents that resistance to hydroplaning performance is better.
(resistance to partial wear performance)
After travelling 1000km on dry pavement, center land X and shoulder land department Z1 (Z2) shown in Fig. 2 are measured respectively
Wear extent, calculate shoulder land department tire width direction both sides wear extent average value, on this basis calculate center land and
The wear extent ratio of shoulder land department.Then, based on this calculate result carry out on the basis of past case 1 (100) index assessment.This is commented
The index of valency is bigger, then it represents that resistance to partial wear performance is better.
These evaluation results are recorded in table 1-1 and table 1-2 in the lump.
[table 1-1]
[table 1-2]
It can be seen from table 1-1 and table 1-2：With the pneumatic tire phase for the past case for being not belonging to technical scope of the invention
Than belonging to the technical scope of the present invention (to dividing the contour line in the land portion to be formed and the groove area ratio of fetus face in fetus face
Improved) 1~embodiment of embodiment 7 pneumatic tire in be above-mentioned control stability 1,2, resistance to hydroplaning
Energy and the excellent performance of resistance to partial wear.
Label declaration
1 pneumatic tire
10 fetus faces
12 tread surfaces
14a, 14b, 14c, 14d circumferential slot
16a, 16b, 16d tipper
18a, 18b, 18c, 18d chamfered section
20a, 20b translot
The tire width direction end points of A1, A2, A3, A4, A5, A6, A7, A8 circumferential slot
B circles surround part
CL equatorial planes
E, E ' ground connection end line
P, P ' reference contours PL0 and contour line PL2, PL3 intersection point
PL0 reference contours
PL1, PL2, Pl3 contour line
R0, R1, R2, R3 radius of curvature
The maximum overhang of S1, S2, S3 relative to reference contour to tire radial outside
X center lands
Y1, Y2 pair center land
Z1, Z2 shoulder land department
Claims (5)
1. a kind of pneumatic tire, 1 is respectively equipped with each side for clipping the tire width direction of equatorial plane along tire circumference
The central major trough of extension and 1 tire shoulder major trough circumferentially extended on the outside of the tire width direction of the central major trough along tire,
By 4 major trough divisions formed with the 5 lands portion circumferentially extended along tire, it is characterised in that
In tire meridional section view,
All 4 points of curve of the tire width direction two-end-point comprising 2 central major troughs is being set to reference contour
In the case of,
The contour line of the center land formed is divided than the reference contour to tire radial outside from 2 central major troughs
It is prominent,
The secondary center land and shoulder land department that successively divide formation is leaned on the outside of tire width direction in central major trough more described than 2
Contour line it is more prominent to tire radial outside than the reference contour, the contour line of the secondary center land and shoulder land department is deposited
Each side for the tire width direction for being to clip equatorial plane and include the tire width direction outermost of the central major trough
The tire width direction two-end-point of point and the tire shoulder major trough,
The groove area ratio Go of vehicle installation exterior lateral area and the groove area ratio Gi of vehicle installation inside region meet Gi>Go's
Relation,
The contour line of the secondary center land and shoulder land department be across and 1 of the secondary center land and the shoulder land department
Contour line.
2. pneumatic tire according to claim 1,
The contour line of the center land relative to the reference contour to the maximum overhang of tire radial outside be 0.2mm
Above and below 0.5mm.
3. pneumatic tire according to claim 1,
The contour line of the secondary center land and the shoulder land department is relative to the reference contour to tire radial outside
Maximum overhang be more than 0.6mm and below 2.0mm, also, contour line of the maximum overhang on the inside of vehicle installation
It is different from the contour line in vehicle installation outside.
4. pneumatic tire according to claim 2,
The contour line of the secondary center land and the shoulder land department is relative to the reference contour to tire radial outside
Maximum overhang be more than 0.6mm and below 2.0mm, also, contour line of the maximum overhang on the inside of vehicle installation
It is different from the contour line in vehicle installation outside.
5. according to pneumatic tire according to any one of claims 1 to 4,
The groove area ratio Gi of vehicle installation inner side meets 30%≤Gi≤40%, and the groove area ratio in vehicle installation outside
Go meets 20%≤Go≤35%.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014-124718 | 2014-06-17 | ||
| JP2014124718A JP5835413B1 (en) | 2014-06-17 | 2014-06-17 | Pneumatic tire |
| PCT/JP2015/066390 WO2015194402A1 (en) | 2014-06-17 | 2015-06-05 | Pneumatic tire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106573506A CN106573506A (en) | 2017-04-19 |
| CN106573506B true CN106573506B (en) | 2018-03-30 |
Family
ID=54933147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201580043988.2A Active CN106573506B (en) | 2014-06-17 | 2015-06-05 | Pneumatic tire |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US10065456B2 (en) |
| EP (1) | EP3159186B1 (en) |
| JP (1) | JP5835413B1 (en) |
| CN (1) | CN106573506B (en) |
| AU (1) | AU2015278090B2 (en) |
| WO (1) | WO2015194402A1 (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6292067B2 (en) * | 2014-07-25 | 2018-03-14 | 横浜ゴム株式会社 | Pneumatic tire |
| JP6828387B2 (en) * | 2016-11-14 | 2021-02-10 | 住友ゴム工業株式会社 | tire |
| JP2018138430A (en) * | 2017-02-24 | 2018-09-06 | 横浜ゴム株式会社 | Pneumatic tire |
| JP6946923B2 (en) * | 2017-10-19 | 2021-10-13 | 横浜ゴム株式会社 | Pneumatic tires |
| JP2019131079A (en) * | 2018-01-31 | 2019-08-08 | Ｔｏｙｏ Ｔｉｒｅ株式会社 | Pneumatic tire |
| JP2019131080A (en) * | 2018-01-31 | 2019-08-08 | Ｔｏｙｏ Ｔｉｒｅ株式会社 | Pneumatic tire |
| JP6610717B1 (en) | 2018-07-02 | 2019-11-27 | 横浜ゴム株式会社 | Pneumatic tire |
| JP7102983B2 (en) * | 2018-07-02 | 2022-07-20 | 横浜ゴム株式会社 | Pneumatic tires |
| DE112019004829T5 (en) * | 2018-11-21 | 2021-06-10 | The Yokohama Rubber Co., Ltd. | tire |
| JP7174611B2 (en) * | 2018-12-07 | 2022-11-17 | Ｔｏｙｏ Ｔｉｒｅ株式会社 | pneumatic tire |
| JP7129950B2 (en) * | 2019-06-14 | 2022-09-02 | 株式会社ブリヂストン | pneumatic tire |
| JP7207240B2 (en) * | 2019-09-03 | 2023-01-18 | 横浜ゴム株式会社 | Method for manufacturing pneumatic tire and green tire |
| JP2021049791A (en) * | 2019-09-20 | 2021-04-01 | 株式会社ブリヂストン | tire |
| KR102547888B1 (en) * | 2021-02-19 | 2023-06-27 | 넥센타이어 주식회사 | Tire |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102858560A (en) * | 2010-11-17 | 2013-01-02 | 横滨橡胶株式会社 | Pneumatic tire |
| CN103640437A (en) * | 2012-03-14 | 2014-03-19 | 横滨橡胶株式会社 | Pneumatic tire |
| CN104203601A (en) * | 2012-03-21 | 2014-12-10 | 横滨橡胶株式会社 | Pneumatic tire |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62103205A (en) * | 1985-07-19 | 1987-05-13 | Bridgestone Corp | Heavy load pneumatic tyre |
| JPH07172107A (en) * | 1993-12-20 | 1995-07-11 | Yokohama Rubber Co Ltd:The | Pneumatic radial tire |
| JP2002029216A (en) | 2000-07-19 | 2002-01-29 | Bridgestone Corp | Pneumatic tire and mounting method for it |
| JP4408236B2 (en) * | 2004-03-22 | 2010-02-03 | 株式会社ブリヂストン | Pneumatic tire |
| JP4973020B2 (en) * | 2006-06-12 | 2012-07-11 | 横浜ゴム株式会社 | Pneumatic tire |
| JP2010012978A (en) * | 2008-07-04 | 2010-01-21 | Bridgestone Corp | Pneumatic tire |
| JP4973708B2 (en) * | 2009-09-11 | 2012-07-11 | 横浜ゴム株式会社 | Pneumatic tire |
| US20110079334A1 (en) * | 2009-10-02 | 2011-04-07 | Andreas Bott | Tire tread having improved contact pressure distribution |
| US9463670B2 (en) * | 2011-10-04 | 2016-10-11 | The Yokohama Rubber Co., Ltd. | Pneumatic tire |
| JP5746681B2 (en) * | 2012-12-19 | 2015-07-08 | 住友ゴム工業株式会社 | Pneumatic tire |
| JP6186147B2 (en) * | 2013-03-22 | 2017-08-23 | 東洋ゴム工業株式会社 | Pneumatic tire |
| DE112014005066T5 (en) | 2013-11-06 | 2016-08-18 | The Yokohama Rubber Co., Ltd. | tire |
-
2014
- 2014-06-17 JP JP2014124718A patent/JP5835413B1/en active Active
-
2015
- 2015-06-05 US US15/319,745 patent/US10065456B2/en not_active Expired - Fee Related
- 2015-06-05 EP EP15808865.8A patent/EP3159186B1/en active Active
- 2015-06-05 CN CN201580043988.2A patent/CN106573506B/en active Active
- 2015-06-05 WO PCT/JP2015/066390 patent/WO2015194402A1/en active Application Filing
- 2015-06-05 AU AU2015278090A patent/AU2015278090B2/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102858560A (en) * | 2010-11-17 | 2013-01-02 | 横滨橡胶株式会社 | Pneumatic tire |
| CN103640437A (en) * | 2012-03-14 | 2014-03-19 | 横滨橡胶株式会社 | Pneumatic tire |
| CN104203601A (en) * | 2012-03-21 | 2014-12-10 | 横滨橡胶株式会社 | Pneumatic tire |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2015278090B2 (en) | 2017-03-30 |
| US20170217254A1 (en) | 2017-08-03 |
| JP5835413B1 (en) | 2015-12-24 |
| EP3159186A1 (en) | 2017-04-26 |
| WO2015194402A1 (en) | 2015-12-23 |
| JP2016002890A (en) | 2016-01-12 |
| AU2015278090A1 (en) | 2017-02-02 |
| EP3159186A4 (en) | 2018-01-24 |
| EP3159186B1 (en) | 2019-10-16 |
| US10065456B2 (en) | 2018-09-04 |
| CN106573506A (en) | 2017-04-19 |
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Address after: Kanagawa Prefecture, Japan Patentee after: THE YOKOHAMA RUBBER Co.,Ltd. Country or region after: Japan Address before: Tokyo, Japan Patentee before: THE YOKOHAMA RUBBER Co.,Ltd. Country or region before: Japan |